Improved machine fob, stuffing leather



@auch tstrs latrat gifting..

. T ALL WHOM/IT MAY CONCERN:

HENRY MULLER, NORTH CAMBRIDGE, lhIASSLi-IUSETTS Letters .Patent 1Y0.78,815, elated June 9, 1868.

IMPRcvsD MAGHINB Por srnrrINe LEATHER'.

Be it known that I, HENRY MLLER, of North Cambridge, in the county ofMiddlesex, and State of Massachusetts, have invented an- Improvement in-Stuiling Leather; land I do hereby decluare that the following, takenin connection with the drawings which accompany and form part of thisspecification, invention suiiicient to enable those skilled inthe arttopractiselt In the process of stuilng leather, which'is the act ofworking it with oil, te cause lthe oil topenetrate the leather to makeit soft and ilexible, close rotary wheels, drums,'or cylinders have beenemployed, into'which the greasy matter and the leather have beenintroduced. l

Heat is then applied by steam-pipes, and otherwise, and,\b'y rotatingthe wheel, the leather is lifted and is a description of my let fall,and is thus turned, worked, and beaten till it absorbs theoil or othersuitable greasy matter.

After the leather is warmed, the action ofthe Wheel gcnerate's'so muchheat that-the temperature so generated added to the heat applied is aptto burn the leather, to retard the absorption ofthe oil, and toevaporate it; and it is to remedy these difiiculties that is the objectof myinvention described herein.

Inthe practice of my invention I make use of a heated closed wheel ordrum, such as has been employed heretofore, and when-.the `Wheel hasbeen revolved suiiiciently to uniformly warm up the leather to thedesired temperature, I transfer the leather thus warm and covered withoil'into a wheel, such as ispshown in the draw ing, half in section andhalf in elevation, and then, by rotating said wheel, finish the studngprocess without increasing the heat, as the heat generated by themovement aboutcquals the heatlost by radiation and con duction. i I '4The Wheel shown. in the drawing has a. close circumference, a, and aclose skirting, b, adjoining the cir` cumference, to prevent loss of oilas the leather is moved by the rotations of the wheel. But the sides orends' of the drum cr ivheel are open, to permit a free circulation ofair, as sh9wninstead of closed, as heretofore, and no heat is applied-tothe'wheel; hence, as it rotates, the air moves freely through the wheel,taking oif the heat generated inthe movement ofthe leather. v f

The open sides of the wheel may be made as s hoivn, by using arms orspokes, or the construction may be varied, so long'as air is freelyadmitted to circulate through the wheel.

The door or trap through which the leather is entered and withdrawnisshown'at c, and bars, cZare made to extend across the wheel, being madefast to the skirting, so as to give projections'to increase the rapidityof the beatin` and softening of the leather as it fails when carried upby the rotations of the wheel.

I claim, in the process of Vstuiing leather, the employment,'subsequentto treating` the leather with oil in a Warm c lose drum or wheel, of awheel or drum, Vso constructed as to admit fr'ec access of the air tothe leather, substantially as and for the purpose described.

Also, the wheel, with the close circumference a, andv skirtin'g b, thedoor c, and cross-bars d when `-made open at the heads or sides of th'ewheel or dr'u'm, as and for the purpose described.

` HENRY MULLER.

Witnesses:

J. Bf CROSBY, f FRA'NcIs GoULD.

